Colorist extraordinaire Matt Wilson explains how he approached a scene from Wonder Woman #4 in order to clarify what was happening:
The first [challenge] is that we have our group of characters split up, and in different parts of the club, and I knew that I could use color help the reader understand which part of the bar each character occupied. There are also quite a few panels with a lot of people drawn in them, and if I were to do my job poorly the art could flatten out and become hard to read. I had to make sure that I did a good job of separating planes (foreground, middleground, background) to properly show the depth of space in the club. In this case coloring different areas of the club with different color schemes solved both problems. These different colored “pools” of light include the blue-green seating area, the yellow bar area, the red stage area, and the crowd being a transition between red (stage) and blue-green (seating area) ending up a pink-ish/purple.
To further explain, he creates a simplified take on certain pages, as well as offering the finished colors:
It’s a really nice look into the thought that goes into coloring, as well as how important it is to the final page – Look at how differently the two versions of the same page above read on first glance.